js实现倒计时60秒的简单代码

时间：2024-03-02 19:40:20
<!DOCTYPE html>
<html lang="en">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>js实现倒计时60秒的简单代码(推荐)</title>
    <script type="text/javascript" src="js/jquery.js"></script>
</head>

<body>
<input type="button" id="btn" value="免费获取验证码" onclick="settime(this)" />
<script type="text/javascript">
    var countdown=60;
    function settime(val) {
        if (countdown == 0) {
            val.removeAttribute("disabled");
            val.value="免费获取验证码";
            countdown = 60;
        } else {
            val.setAttribute("disabled", true);
            val.value="重新发送(" + countdown + ")";
            countdown--;
            setTimeout(function() {
                settime(val)
            },1000)
        }

    }
</script>
</body>
</html>

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